Hydrochloric Acid → 4'-(4-(4-Propionylpiperazin-1-yl)-3(trifluoromethyl)phenylamino)-3,6'-biquinoline-3'-carboxylic acid

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Reaction Steps

To a solution of compound 5.4 ethyl 4′-(4-(4-propionylpiperazin-1-yl)-3-(trifluoromethyl)phenylamino)-3,6′-biquinoline-3′-carboxylate in THF/MeOH/H2O (1:1:1, 6 mL) at room temperature was added NaOH (76 mg, 1.9 mmol, 5 equiv.). The resulting solution was stirred overnight. To the mixture was added HCl (1N) to adjust the pH to 4, and EtOAC (20 mL) to extract the product. The organic layer was concentrated to afford the desired product 5.5 4′-(4-(4-propionylpiperazin-1-yl)-3-(trifluoromethyl)phenylamino)-3,6′-biquinoline-3′-carboxylic acid. LC-MS (M+H): 622.21

Provenance & Evidence